Pat the chicken breasts dry and slice them into thin cutlets. Season both sides generously with salt, pepper, garlic powder, and onion powder.
Sear the Chicken
In a large skillet over medium-high heat, heat the olive oil and butter. Add the chicken and sear for 3–4 minutes per side, or until golden and cooked through. Transfer to a plate and keep warm.
Make the Cream Sauce
Lower the heat to medium. In the same skillet, sauté minced garlic until fragrant (about 30 seconds). Add the chicken broth, scraping up the brown bits from the pan.
Add Cream & Cheese
Pour in the heavy cream and bring to a gentle simmer. Stir in the parmesan cheese and oregano, whisking until smooth and creamy.
Add Veggies
Stir in the sun-dried tomatoes and spinach. Let the spinach wilt into the sauce (about 2 minutes).
Finish the Dish
Return the chicken to the skillet, spooning the sauce over each piece. Simmer for another 3–4 minutes to let everything meld together.